What is a arrays and function in python

In C programming, you can pass en entire array to functions. Before we learn that, let's see how you can pass individual elements of an array to functions.

---

Passing individual array elements

Example 1: Passing an array

#include <stdio.h>
void display(int age1, int age2)
{
    printf("%d\n", age1);
    printf("%d\n", age2);
}

int main()
{
    int ageArray[] = {2, 8, 4, 12};

    // Passing second and third elements to display()
    display(ageArray[1], ageArray[2]); 
    return 0;
}

Output

8
4

---

Example 2: Passing arrays to functions

// Program to calculate the sum of array elements by passing to a function 

#include <stdio.h>
float calculateSum(float age[]);

int main() {
    float result, age[] = {23.4, 55, 22.6, 3, 40.5, 18};

    // age array is passed to calculateSum()
    result = calculateSum(age); 
    printf("Result = %.2f", result);
    return 0;
}

float calculateSum(float age[]) {

  float sum = 0.0;

  for (int i = 0; i < 6; ++i) {
  sum += age[i];
  }

  return sum;
}

Output

Result = 162.50

To pass an entire array to a function, only the name of the array is passed as an argument.

result =  calculateSum(age);

However, notice the use of [] in the function definition.

float calculateSum(float age[]) {
... ..
}

This informs the compiler that you are passing a one-dimensional array to the function.